Pete Higgin’s hinted that we should cleanup this hack (asking to do the opacity and then getting the value back out) and finally (due to a weird bug in a WebKit nightly that gave me reason to poke) I cleaned it up:

Well, at this point I guess that’s the cleanest/best way and a nice one. This kind of fx is in any case a common one, so the only thing I could think about is an extension with a parameter for the image in order to spinIn and spinOut the image adding every other callback implementable.

P.S. I had an absolutely weird behavior with FF3.5 and only the first time when the image entered starting from a different angle (less than zero) and I could even notice different fillRect colors as squares … silly of me not a shot, sorry for that!